Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a47dd4b24d551d0…

MALICIOUS

PDF

86.6 KB Created: 2021-07-21 06:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f0805861d486d9e73f1a46e11ccf8541 SHA-1: bc920f338363f9f192d8c6217d283a4908c2335b SHA-256: 7a47dd4b24d551d054b77178571f32d461c1e6b39800d0663d2dc166368c69ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://sghscsjamarai.org/guruhargobind/userfiles/file/nelagudesimuwezite.pdf In PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/29765959141.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/62917907120.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb80bda1c2---wigalol.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e53b73c2b---50546169146.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/ffeec2fb0d33bcc30d9c93fbeb32a16d/sejozerekew.pdfIn PDF document text
    • http://119pump.net/d/files/26032765415.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/85927796058.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/dca007be53f164e8e71a879c5730c183/81764512644.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/qari806b7h67h6cf4716k404nn/39628519307.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/1q0jppc6k4396he8qkuqn4h612/16184410284.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4a762bac0---27386904707.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/75s56kfiso6farqsiv7ks9lp8g/77570020236.pdfIn PDF document text
    • https://seerupit.dk/assens/file/62931793528.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/65554851449.pdfIn PDF document text
    • https://drvishweshwari.in/userfiles/file/gepazuruguwido.pdfIn PDF document text
    • http://amdind.com/userfiles/file/67828631722.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16091b84354a54---90720204755.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086be5244e54---jexibisamowesituwuxakok.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/dkkhqrjkj7m206049gedbptfie/fosineno.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/88826418088.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/f964a4849f91a14685f132eca912cd07/jefikefigopuzugupo.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/62270735759.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=causes+of+business+failure+and+solutions+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDA 10760 bytes
SHA-256: 4a23b1f146879e986b147c7e0e4893d10cf6af8a9dc44d6a0f80792edd006096
font_01_sfnt_off0001087d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087D 17052 bytes
SHA-256: f709e00af2215c9e6ce1e28c6995586bf07b48cf1d9df1dfd4cf72953e2facc6
font_02_sfnt_off00013508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13508 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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